3a6n

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[[Image:3a6n.png|left|200px]]
 
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{{STRUCTURE_3a6n| PDB=3a6n | SCENE= }}
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==The nucleosome containing a testis-specific histone variant, human H3T==
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<StructureSection load='3a6n' size='340' side='right'caption='[[3a6n]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3a6n]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3A6N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3A6N FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3a6n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3a6n OCA], [https://pdbe.org/3a6n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3a6n RCSB], [https://www.ebi.ac.uk/pdbsum/3a6n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3a6n ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/H31T_HUMAN H31T_HUMAN] Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/a6/3a6n_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3a6n ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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A histone H3 variant, H3T, is highly expressed in the testis, suggesting that it may play an important role in the chromatin reorganization required for meiosis and/or spermatogenesis. In the present study, we found that the nucleosome containing human H3T is significantly unstable both in vitro and in vivo, as compared to the conventional nucleosome containing H3.1. The crystal structure of the H3T nucleosome revealed structural differences in the H3T regions on both ends of the central alpha2 helix, as compared to those of H3.1. The H3T-specific residues (Met71 and Val111) are the source of the structural differences observed between H3T and H3.1. A mutational analysis revealed that these residues are responsible for the reduced stability of the H3T-containing nucleosome. These physical and structural properties of the H3T-containing nucleosome may provide the basis of chromatin reorganization during spermatogenesis.
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===The nucleosome containing a testis-specific histone variant, human H3T===
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Structural basis of instability of the nucleosome containing a testis-specific histone variant, human H3T.,Tachiwana H, Kagawa W, Osakabe A, Kawaguchi K, Shiga T, Hayashi-Takanaka Y, Kimura H, Kurumizaka H Proc Natl Acad Sci U S A. 2010 Jun 8;107(23):10454-9. Epub 2010 May 24. PMID:20498094<ref>PMID:20498094</ref>
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{{ABSTRACT_PUBMED_20498094}}
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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==About this Structure==
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<div class="pdbe-citations 3a6n" style="background-color:#fffaf0;"></div>
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[[3a6n]] is a 10 chain structure of [[Histone]] with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3A6N OCA].
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==See Also==
==See Also==
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*[[Histone|Histone]]
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*[[Histone 3D structures|Histone 3D structures]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:020498094</ref><references group="xtra"/>
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Kagawa, W.]]
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[[Category: Large Structures]]
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[[Category: Kimura, H.]]
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[[Category: Kagawa W]]
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[[Category: Koichiro, K.]]
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[[Category: Kimura H]]
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[[Category: Kurumizaka, H.]]
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[[Category: Koichiro K]]
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[[Category: Osakabe, A.]]
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[[Category: Kurumizaka H]]
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[[Category: Shiga, T.]]
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[[Category: Osakabe A]]
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[[Category: Tachiwana, H.]]
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[[Category: Shiga T]]
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[[Category: Antibiotic]]
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[[Category: Tachiwana H]]
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[[Category: Antimicrobial]]
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[[Category: Chromosomal protein]]
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[[Category: Citrullination]]
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[[Category: Dna-binding]]
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[[Category: Dna-binding protein]]
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[[Category: Histone-fold]]
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[[Category: Isopeptide bond]]
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[[Category: Methylation]]
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[[Category: Nucleosome core]]
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[[Category: Nucleus]]
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[[Category: Phosphoprotein]]
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[[Category: Structural protein-dna complex]]
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Current revision

The nucleosome containing a testis-specific histone variant, human H3T

PDB ID 3a6n

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